EM84502
PS/2 MOUSE CONTROLLER
2
3
3
4
5
6
7
0-7
0-7
Reserved
0 = Normal speed, 1 = Autospeed
0 = Disabled, 1 = Enabled
0 = Stream mode, 1 = Remote mode
Reserved
Current resolution setting ( D0 - D7 )
Current sampling rate ( D0 - D7 )
n). Set Resolution ( E8,XX )
EM84502 provides four resolutions selected by the second byte of this command as follows:
Second Byte XX
00
01
02
03
Resolution
8 dot/count
4 dot/count
2 dot/count
1 dot/count
o). Set Autospeed ( E7 )
At the end of a sample interval in the stream mode, the current X and Y data values are converted new values.
The sign bits are not involved in this conversion. The conversion is only in stream mode. The relationship
between the input and output count follows:
Input
0
1
2
3
4
5
N(≥6 )
p). Reset Autospeed ( E6 )
This command restore normal speed.
F) Testing mode
Whenever OPT is connected to OSC OUT, the chip will enter buyer's testing mode. The X direction output
signals of comparators will present to L and M pin. Pressing "R" key can toggle the output from X direction
to Y direction.
Ouput
0
1
1
3
6
9
2.0*N
ABSOLUTE MAXIMUM RATINGS
Parameter
Temperature under bias
Storage temperature range
Input voltage
Output voltage
Sym.
T
OPR
T
STR
V
IN
V
O
Ratings
0~70
-65~150
-0.3~6.0
-0.3~6.0
Unit
°C
°C
V
V
6.18.1998
7
* This specification are subject to be changed without notice.
EMC [ ELAN MICROELECTRONICS CORP ]
